Transformer substation relay protection wiring detector and detection method

Abstract

The invention discloses a transformer substation relay protection wiring detector and a detection method, and belongs to the technical field of transformer substation relay protection system line detection. The detector comprises a receiving end unit, a sending end unit and a man-machine interaction unit. The analog circuit breaker module B of the transmitting end unit is connected to an opening and closing loop of a real high-voltage circuit breaker of a transformer substation, replaces the real high-voltage circuit breaker to receive a tripping and closing signal of a relay protection device, and feeds back an on-off state signal. During detection, the antenna of the receiving end unit of the detector is vertically placed at the edge of the box body, the protection device is connected with the equipment leading-out terminal, the opening and closing of the analog circuit breaker are controlled through the manual button, and the on-off state of the analog circuit breaker displayed on the tablet computer is observed in real time. The problems of low efficiency, high safety risk, large personnel investment and insufficient data accuracy in verification of a traditional relay protection device are solved. And multi-scene and long-distance efficient verification is realized, the shutdown time of the relay protection device is shortened, and the method has a good application prospect.

Description

Technical Field

[0001] This invention belongs to the field of substation relay protection system line testing technology, specifically relating to a substation relay protection wiring tester and testing method. Background Technology

[0002] Relay protection systems are among the most important secondary equipment in power systems and are a key component in ensuring the safe operation of the power system. During the construction and operation of substations, it is necessary to regularly inspect relay protection devices and circuits to ensure that they are functioning properly.

[0003] Currently, relay protection testing equipment on the market faces several technical bottlenecks: traditional testing instruments have limited port configurations, making it difficult to meet the needs of multiple testing scenarios; firstly, testing relies on actual high-voltage circuit breakers, which is complex to operate and carries safety risks such as short circuits and malfunctions; secondly, testing efficiency is low, requiring significant manpower and resulting in high labor intensity, with human factors affecting the accuracy of test results; thirdly, the devices are inconvenient to carry, making it difficult to adapt to the needs of multi-location and long-distance verification in substations, such as main control rooms, high-voltage rooms, and switchyards; and fourthly, the long downtime of relay protection devices affects power supply stability.

[0004] In terms of testing technology, most existing equipment adopts the "switching power supply + linear amplifier" mode. This mode has certain advantages when outputting small signals, but it suffers from low efficiency (only 30-50%) when outputting high power. Furthermore, linear amplifiers have the disadvantage of complex adjustment of each stage of operating point, which is not conducive to mass production. Although the "switching power supply + switching amplifier" mode can improve efficiency to 75-90% and does not require complex adjustment, the design of the switching amplifier output filter circuit is critical. If the parameters are not set properly, it will lead to a deterioration of the output waveform and affect the detection accuracy.

[0005] Therefore, there is an urgent need for an efficient, safe, and convenient verification auxiliary device to solve the above problems. Summary of the Invention

[0006] To address the problems existing in the current technology, this paper provides a substation relay protection wiring tester that can achieve rapid detection, accurate measurement and automated data management of wiring, significantly improving the detection efficiency and reliability of the substation relay protection system.

[0007] To solve the above technical problems, the present invention provides the following technical solution: a substation relay protection wiring tester, comprising a receiving unit, a transmitting unit, and a human-machine interaction unit;

[0008] The receiving unit includes: N analog circuit breaker modules A, a wireless receiving module, a signal transmission module A, a microcontroller main controller, and an optocoupler isolation circuit A.

[0009] The optocoupler isolation circuit A is connected to the built-in analog circuit breaker module A of the receiving unit to collect the on / off status of the analog circuit breaker A; the microcontroller main controller is electrically connected to the wireless receiving module, the signal transmission module, and the optocoupler isolation circuit respectively. The microcontroller main controller has a built-in encryption algorithm. The wireless receiving module receives the signal from the transmitting unit and the status signal of the built-in analog circuit breaker A. After being processed by the microcontroller main controller, the signal is sent to the human-machine interaction module through the signal transmission module.

[0010] The transmitting unit includes: N analog circuit breaker modules B, a wireless transmitting module, a microcontroller minimum system, and an optocoupler isolation circuit B.

[0011] The optocoupler isolation circuit B is connected to the built-in analog circuit breaker module B of the transmitting unit, and is used to collect the on / off status of the analog circuit breaker module A. The microcontroller is electrically connected to both the wireless transmitting module and the optocoupler isolation circuit B, and is used to transmit the analog circuit breaker on / off status signal. The microcontroller minimum system is electrically connected to both the wireless transmitting module and the optocoupler isolation circuit, and transmits the status signal of the analog circuit breaker B to the wireless receiving module of the receiving unit through the wireless transmitting module. The analog circuit breaker module B of the transmitting unit is connected to the opening and closing circuit of the actual high-voltage circuit breaker in the substation, replacing the actual high-voltage circuit breaker in receiving the tripping and closing signals of the relay protection device, and feeding back the on / off status signal.

[0012] Furthermore, the aforementioned human-machine interaction unit establishes communication with the receiving unit through the Bluetooth communication unit to receive and display the on / off status of N analog circuit breaker modules, and supports setting the name of each analog circuit breaker module.

[0013] Furthermore, the aforementioned receiving unit is placed in the substation monitoring room and has a wiring terminal that connects to the protection device cabinet in the monitoring room. The switching of the opening and closing states of the built-in analog circuit breaker module is achieved through control buttons.

[0014] Furthermore, the aforementioned transmitting unit adopts a box-type structure, and the simulated circuit breaker module B uses relays to build a logic circuit, and is equipped with a manual trip / close button and status indicator lights.

[0015] Furthermore, the aforementioned human-computer interaction unit is equipped with a tablet computer running the Android operating system, which receives and displays the on / off status of the simulated circuit breaker module.

[0016] This invention also provides a detection method based on a substation relay protection wiring tester, the steps of which are as follows:

[0017] S1. Open the aluminum alloy enclosure of the equipment and place the antenna of the receiving unit vertically on the edge of the enclosure; confirm that the power supply voltage, operating status and wireless connection status of the equipment are normal; install the transmitting unit at the actual high-voltage circuit breaker in the substation or at a remote location such as the main control room, protection room, or high-voltage room, and connect each transmitting unit to the opening and closing circuit of an actual high-voltage circuit breaker.

[0018] S2. Disconnect the power supply to the protection device, and then connect the protection device to the equipment's lead-out terminals. When disconnecting the external circuit wiring of the protection device, wrap it with insulating tape and make a record. After the wiring is completed, use a multimeter to measure the lower terminal of the device's power supply circuit breaker to ensure that the resistance between the positive and negative power supplies meets the requirements.

[0019] S3. Verification: Set the names of each simulated circuit breaker through the human-machine interaction module; establish a connection with the receiving unit; control the opening and closing of the simulated circuit breakers through manual buttons or relay protection device output signals; observe the on / off status of N simulated circuit breakers displayed on the tablet computer in real time to verify the correctness of the protection output logic.

[0020] Furthermore, step S3 mentioned above also includes signal filtering operations. By changing the upper and lower thresholds of the filtering window, the optimal effect of mean filtering is achieved. After mean filtering, the signal value formula for the signal point is as follows:

[0021]

[0022] In the formula: Let represent the signal value of the synthesized signal with noise at point j; the upper and lower limits of the filter window are in the range [-a, b]; the sampling points in the window are represented as . , ... , , ... , .

[0023] Furthermore, after the aforementioned signal filtering operation, an encryption algorithm is constructed to ensure signal security. The steps are as follows:

[0024] Step A: Construct an elliptic curve on GK(p), as shown in the following formula:

[0025]

[0026] In the formula, p is a prime number. Represents the modulus. Let x and y represent points on the ellipse. b represents a constant;

[0027] Step B: Solve for the elliptic curve. All solutions follow the following addition algorithm: point The element denoted as 0 is added to itself as shown in the formula: , point The addition formula for all solution points M(x, y) on the elliptic curve is as follows: ,

[0028] Step C: Create a public key. The public key uses the efficient cryptographic standard set SECG to describe ECC cryptography using a formula in the SEC1 elliptic curve cryptography standard, as follows:

[0029] T=<p,a,b,G,n,h>

[0030] In the formula, p is used to determine GK(p), where p is a prime number greater than 3, and the two elements a and b are used to construct an elliptic curve, where a, b∈GK(p); the two elements G and n are used to find the subgroup. of, It represents a cyclic group, G is In the diagram, the base point is denoted by n, which represents the order of G and is a prime number; h represents the additive commutative group E and its subgroups. The connection link. The definition of the private key d is as follows:

[0031]

[0032] The public key Q is obtained by the dot product of the private key d and the base point G, as follows:

[0033] Q = dG.

[0034] Furthermore, the solution process for step B mentioned above is as follows:

[0035] Another M ( , ) and N( , All of these are points on the solution to the elliptic curve, and = , = Then M( , ) and N( , The addition operation is shown below. It can be seen that any solution point M on the elliptic curve ( , The inverse of ) is M( , ),

[0036] M( , )+ N( , )=0,

[0037] When M( , )≠±N( , ), then M( , ) and N( , The addition formula is as follows:

[0038] The relationships between the variables in the formula are shown below:

[0039] ,

[0040] Indicates a multiple relationship;

[0041] When M( , )= N( , ), then M( , ) and N( , The addition formula is as follows:

[0042] M( , )+ N( , )=2 M( , )= R( , )

[0043] The relationship between the variables in the formula is shown below:

[0044] .

[0045] Compared with the prior art, the beneficial technical effects of the present invention using the above technical solution are as follows:

[0046] 1. Safe and reliable: By replacing real high-voltage circuit breakers with simulated circuit breaker modules, direct operation of high-voltage equipment is avoided, reducing safety risks such as short circuits and malfunctions; during the wiring process, auxiliary means such as insulation treatment and multimeter testing are used to further prevent incorrect wiring and power supply cross-connection problems.

[0047] 2. High efficiency and convenience: The device is easy to carry, and the transmitting and receiving units support long-distance wireless communication, which can meet the needs of multi-location verification in substations; it is simple to operate, and the status is displayed intuitively through the human-machine interface. No complicated debugging is required, which greatly reduces personnel input and labor intensity and improves test efficiency.

[0048] 3. Accurate data: Through opto-isolation and wireless communication anti-interference design, the accuracy of simulated circuit breaker status acquisition and transmission is ensured, and the test results are highly reliable; human operation errors are avoided, ensuring the quality of verification.

[0049] 4. Reduce downtime: Simplify the verification process, improve testing efficiency, effectively reduce the downtime of relay protection devices, and ensure power supply stability. Attached Figure Description

[0050] Figure 1 This is a block diagram of the overall composition of the detector of the present invention.

[0051] Figure 2 This is a schematic diagram of the transmitter structure of the detector of the present invention.

[0052] Figure 3 This is a schematic diagram of the receiving end structure of the detector of the present invention.

[0053] Figure 4 This is a flowchart of the specific process of the detector of the present invention. Detailed Implementation

[0054] To better understand the technical content of the present invention, specific embodiments are described below in conjunction with the accompanying drawings.

[0055] In this invention, various aspects of the invention are described with reference to the accompanying drawings, in which numerous illustrative embodiments are shown. Embodiments of the invention are not limited to those depicted in the drawings. It should be understood that the invention is implemented through any of the various concepts and embodiments described above, as well as the concepts and embodiments described in detail below, because the concepts and embodiments disclosed herein are not limited to any particular implementation. Furthermore, some aspects of the invention disclosed may be used alone or in any suitable combination with other aspects of the invention disclosed.

[0056] like Figure 1-3 As shown, this embodiment provides a substation relay protection wiring tester, including a receiving unit, a transmitting unit, and a human-machine interaction unit;

[0057] The receiving unit is located in the substation monitoring room and includes: N analog circuit breaker modules A, a wireless receiving module, a signal transmission module A, a microcontroller main controller, and an optocoupler isolation circuit A.

[0058] The optocoupler isolation circuit A is connected to the built-in analog circuit breaker module A of the receiving unit and is used to collect the on / off status of the analog circuit breaker A. The microcontroller is electrically connected to the wireless receiving module, the signal transmission module, and the optocoupler isolation circuit. The wireless receiving module receives the signal from the transmitting unit and the status signal of the built-in analog circuit breaker A. After being processed by the microcontroller, the signal is sent to the human-machine interaction module through the signal transmission module.

[0059] The transmitting unit adopts a box-type structure, including: N analog circuit breaker modules B, a wireless transmitting module, a single-chip microcomputer minimum system, and an optocoupler isolation circuit B, with 220VDC power input terminals and closing / tripping input terminals.

[0060] The optocoupler isolation circuit B is connected to the built-in simulated circuit breaker module B of the transmitting unit, and is used to collect the on / off status of the simulated circuit breaker module A. The microcontroller is electrically connected to both the wireless transmitting module and the optocoupler isolation circuit B, and is used to transmit the simulated circuit breaker on / off status signal. The microcontroller minimum system is electrically connected to both the wireless transmitting module and the optocoupler isolation circuit, and transmits the status signal of the simulated circuit breaker B to the wireless receiving module of the receiving unit through the wireless transmitting module. The simulated circuit breaker module B of the transmitting unit is connected to the opening and closing circuit of a real high-voltage circuit breaker in the substation. It is equipped with a manual trip / close button and a status indicator light, and can be connected to the opening and closing circuit of a real high-voltage circuit breaker to simulate real actions and provide feedback status signals.

[0061] The receiving unit communicates with the transmitting unit wirelessly, supporting long-distance communication; the receiving unit communicates with the human-machine interaction module via Bluetooth.

[0062] The human-computer interaction unit uses a tablet computer with an Android operating system to receive and display the on / off status of n simulated circuit breaker modules. It supports setting the names of the simulated circuit breakers, locating the circuit breakers through the Beidou positioning module, and displaying their status intuitively.

[0063] like Figure 4 As shown, based on the above wiring tester, the testing process is as follows:

[0064] Preparation before the test: Open the aluminum alloy box of the equipment and place the antenna of the receiving unit vertically on the edge of the box; check whether the power supply voltage, operating status and wireless connection status of the equipment are normal.

[0065] Wiring procedure: First disconnect the power supply to the protection device, then connect the protection device to the equipment's lead-out terminals; when disconnecting the external circuit wiring of the protection device, wrap it with insulating tape and make a record; after the wiring is completed, use a multimeter to measure the lower terminal of the device's power supply circuit breaker to ensure that the resistance between the positive and negative power supplies meets the requirements.

[0066] Verification process: Set the names of each simulated circuit breaker through the human-machine interaction module; control the opening and closing of the simulated circuit breakers through manual buttons or relay protection device output signals according to the verification requirements; observe the on / off status of n simulated circuit breakers displayed on the tablet computer in real time to verify the correctness of the protection output logic.

[0067] The detector housing has a variety of interfaces: including a transmitting unit and a receiving unit with identical structure and function, and the device integrates n analog circuit breaker modules.

[0068] The technical parameters are as follows: operating environment: ambient temperature -5℃ to +40℃, relative humidity 5% to 95% (no condensation or freezing inside), atmospheric pressure 66kPa to 110kPa; DC power supply: rated voltage 24V, allowable deviation -10% to +10%, ripple coefficient not greater than 5%; power loss: total power consumption of the device not greater than 20W.

[0069] The working principle of this detector is as follows:

[0070] First, the transmitting unit is installed at the actual outdoor high-voltage circuit breaker in the substation or at a remote location such as the main control room, protection room, or high-voltage room. Each transmitting unit is connected to the opening and closing circuit of an actual high-voltage circuit breaker.

[0071] The human-computer interaction module and the receiving unit are connected via Bluetooth and placed in a location that is easy for staff to observe and operate.

[0072] Next, open the aluminum alloy casing of the device and place the receiver unit antenna vertically on the edge of the casing; check whether the device power supply voltage, operating status and wireless connection status are normal.

[0073] Next, perform the wiring operation: first disconnect the power supply of the protection device, and then connect the protection device to the equipment's lead-out terminals; when disconnecting the external circuit wiring of the protection device, wrap it with insulating tape and make a record; after the wiring is completed, use a multimeter to measure the lower terminal of the device's power supply circuit breaker to ensure that the resistance between the positive and negative power supplies meets the requirements.

[0074] The next step is to perform the verification process: set the names of each simulated circuit breaker through the human-machine interaction module; control the opening and closing of the simulated circuit breakers by manually pressing buttons or outputting signals from relay protection devices according to the verification requirements; observe the on / off status of the n simulated circuit breakers displayed on the tablet computer in real time to verify the correctness of the protection output logic.

[0075] During the calibration process, the working principle of the detector makes it susceptible to noise interference. Therefore, noise signals need to be filtered. Filtering typically employs a combination of hardware and software filtering. A mean filter primarily calculates the filtered signal value at a selected window by averaging the signal values ​​within that window. The optimal mean filtering effect can be achieved by adjusting the upper and lower thresholds of the filtering window. The formula for the signal value at that point after mean filtering is as follows.

[0076]

[0077] In the formula: Let represent the signal value of the synthesized signal with noise at point j; the upper and lower limits of the filter window are in the range [-a, b]; the sampling points in the window are represented as . , ... , , ... , .

[0078] Mean filtering is suitable for complex and variable environments and can significantly improve the accuracy of detectors. However, to ensure stable signal transmission and substation security, elliptic curve encryption is required after mean filtering to encrypt the data. The first step is to construct the finite field elliptic curve, as shown in the following formula:

[0079]

[0080] This formula represents an elliptic curve constructed on GK(p), where p is a prime number. Represents the modulus. Let x and y represent points on the ellipse. b represents a constant.

[0081] All solutions follow the following addition rules:

[0082] 1. Let a point be defined. Let it be denoted as 0. The addition operation between itself and itself is as shown in the formula below.

[0083] ,

[0084] 2. The addition formula for all solution points M(x, y) on the elliptic curve is shown below.

[0085] ,

[0086] 3. Here we assume M( , ) and N( , All of these are points on the solution to the elliptic curve, and = , = Then M( , ) and N( , The addition operation is shown below. It can be seen that any solution point M on the elliptic curve ( , The inverse of ) is M( , ).

[0087] M( , )+ N( , )=0,

[0088] 4. If it is M ( , )≠±N( , ), then M( , ) and N( , The addition formula is shown below.

[0089] M( , )+ N( , )= R( , ),

[0090] The relationships between the variables are shown below.

[0091] ,

[0092] Indicates a multiple relationship;

[0093] 5. If it is M ( , )= N( , ), then M( , ) and N( , The addition formula is shown below.

[0094] M( , )+ N( , )=2 M( , )= R( , ),

[0095] The relationship between the variables in the formula is shown below.

[0096] ,

[0097] After the encryption algorithm is constructed, a public key also needs to be built. The public key is described by the Standards for Efficient Cryptography Group (SECG) using a formula in the SEC1 (Standards for Efficient Cryptography 1) circular curve cryptography standard, as shown below.

[0098] T=<p,a,b,G,n,h>

[0099] In the formula, p is used to determine GK(p), where p is a prime number greater than 3, and the elements a and b are used to construct an elliptic curve such that a, b ∈ GK(p); the elements G and n are used to find the subgroup. of, It represents a cyclic group, G is In the diagram, the base point is denoted by n, which represents the order of G, and n must be a prime number; the element h represents the additive commutative group E and its subgroups. The connection link. The definition of the private key d is as follows.

[0100]

[0101] The public key Q is obtained by the dot product of the private key d and the base point G, as follows:

[0102] Q = dG.

[0103] After completing the above calculations, the human-computer interaction module will receive and display the on / off status of n simulated circuit breaker modules, and supports setting the names of the simulated circuit breakers to achieve intuitive status display.

[0104] After the final test is completed, disconnect the power supply to the device first, and then remove the test wiring; restore the original wiring of the protection device according to the record to ensure that the wiring is correct.

[0105] In summary, the substation relay protection wiring tester of this invention, through its highly integrated design, combined with portability and a user-friendly interface, achieves rapid and accurate testing of substation relay protection wiring, significantly improving testing efficiency and reliability, reducing the workload of operators, and demonstrating promising application prospects.

[0106] While the present invention has been described above with reference to preferred embodiments, it is not intended to limit the invention. Those skilled in the art can make various modifications and refinements without departing from the spirit and scope of the invention. Therefore, the scope of protection of the present invention shall be determined by the claims.

Claims

1. A substation relay protection connection detector, characterized in that, It comprises a receiving end unit, a sending end unit and a man-machine interaction unit; The receiving end unit comprises N analog circuit breaker modules A, a wireless receiving module, a signal transmission module A, a single-chip microcomputer master and an optical coupling isolation circuit A. The optical coupling isolation circuit A is connected with the analog circuit breaker module A built in the receiving end unit and used for collecting the on-off state of the analog circuit breaker A. The single-chip microcomputer master is electrically connected with the wireless receiving module, the signal transmission module and the optical coupling isolation circuit. The sending end unit comprises N analog circuit breaker modules B, a wireless sending module, a single-chip microcomputer minimum system and an optical coupling isolation circuit B.

2. The substation relay protection wiring detector according to claim 1, characterized in that, The optical coupling isolation circuit B is connected with the analog circuit breaker module B built in the sending end unit and used for collecting the on-off state of the analog circuit breaker module A.

3. The substation relay protection wiring detector according to claim 1, characterized in that, The single-chip microcomputer is electrically connected with the wireless sending module and the optical coupling isolation circuit B and used for transmitting the on-off state signal of the analog circuit breaker.

4. The substation relay protection wiring detector according to claim 1, characterized in that, The single-chip microcomputer minimum system is electrically connected with the wireless sending module and the optical coupling isolation circuit and used for transmitting the state signal of the analog circuit breaker B to the wireless receiving module of the receiving end unit through the wireless sending module.

5. The substation relay protection wiring detector according to claim 1, characterized in that, The analog circuit breaker module B of the sending end unit is connected with the opening and closing circuit of the real high-voltage circuit breaker in the substation and replaces the real high-voltage circuit breaker to receive the tripping and closing signals of the relay protection device and feed back the on-off state signal.

6. The method of detecting a substation relay protection connection according to any one of claims 1-5, characterized in that, The man-machine interaction unit establishes communication with the signal transmission of the receiving end unit through the Bluetooth communication unit, receives and displays the on-off state of the N analog circuit breaker modules and supports the name setting of each analog circuit breaker module. The receiving end unit is placed in the monitoring room of the substation, connected with the protection device screen cabinet in the monitoring room through the lead-out terminal and realizes the switching of the opening and closing state of the built-in analog circuit breaker module through the control button. The sending end unit adopts a box structure, the analog circuit breaker module B is connected with the relay to build a logic circuit, a manual tripping and closing button and a state indicator lamp are arranged. The man-machine interaction unit is a tablet computer with an Android operating system, which receives and displays the on-off state of the analog circuit breaker module. The steps are as follows: S1, open the aluminum alloy box body of the equipment, place the antenna of the receiving end unit vertically on the edge of the box body, determine that the power voltage, running state and wireless connection state of the equipment are normal, install the sending end unit at the real high-voltage circuit breaker in the substation or in the main control room, protection room and high-voltage room, each sending end unit is connected with the opening and closing circuit of one real high-voltage circuit breaker; S2, disconnect the power supply of the protection device, then connect the protection device with the lead-out terminal of the equipment, wrap the peripheral circuit connection of the protection device with insulating tape and make a record, after the connection is completed, measure the resistance between the positive and negative power supplies with a multimeter to ensure that the resistance between the positive and negative power supplies meets the requirements; S3, check: through the man-machine interaction module to set the name of each analog circuit breaker; receiving end unit through the establishment of connection; through the manual button or relay protection device output signal control analog circuit breaker opening and closing; real-time observation of the tablet computer display N analog circuit breaker on-off state, verify the protection outlet logic correctness.

7. The detection method according to claim 6, characterized in that, The step S3 further comprises a signal filtering operation, and the best effect of mean filtering is achieved by changing upper and lower thresholds of a filtering window. ， wherein: denotes the signal value of the noisy synthesis signal at point j; the upper and lower limits of the filter window are in the range [-a, b]; the sample points in the window are denoted by , , , , , , .

8. The detection method according to claim 7, characterized in that, After the signal filtering operation, an encryption algorithm is constructed to ensure signal security, and the steps are as follows: Step A: constructing an elliptic curve on GK(p), and the formula is as follows: ， where p is a prime number, denotes a modulus, denotes an elliptic curve, x, y respectively denote points on the ellipse, a, b respectively denote constants; Step B: solving the elliptic curve, and all solutions follow the following addition operation method: Point The zero element, denoted 0, is the element itself with the additive operation as the formula like: ， Point The addition operation formula of the point M(x, y) of all solutions on the elliptic curve is as follows: ， Step C: building a public key, the public key is described by the formula in the elliptic curve cryptography standard of SEC1 in the high-efficiency password standard group SECG, and the formula is as follows: T = <p, a, b, G, n, h>, where p is used to determine GK(p), p is a prime number and is greater than 3, and a and b are elements used to construct an elliptic curve, and a, b e GK(p); G and n are elements used to find a subgroup of, GK(n), where G is a base point in GK(n), and n is the order of G, and n is a prime number; h is a link between the additive group E and the subgroup The private key d is defined as follows: ， The public key Q is obtained by point multiplication of the private key d and the base point G, and the formula is as follows: Q = dG.

9. The detection method according to claim 8, characterized in that, The solving process of step B is as follows: M , ) and N , ) are points on the elliptic curve, and , , then the addition of M , ) and N , ) is as follows, and it can be seen that the inverse of any point M , ) on the elliptic curve is M , ),​​ M( , )+ N( , )=0, When M( , )≠±N( , ), the addition operation formula of M( , ) and N( , ) is as follows: The relationship between the variables in the formula is as follows: ， represents a multiple relationship; When M( , )= N( , ), the addition operation formula of M( , ) and N( , ) is as follows: M( , )+ N( , )=2 M( , )= R( , ) The relationship between the variables in the formula is as follows: 。

Images